Breast-drill.



0. D. HAPGOOD.

BREAST DRILL.

APPLICATION FILED APR. I. 1914.

Patented Oct. 19, 1915.

2 SHEETS--SHEET I.

III

W/T/I/ESSES Wwf lfmg/ /fvl/E/voH er @ya @72am Arron/ufr o. D. HAPGooD. BREAST DRILL.

APPLICATION FILED APR. 7, 1914.

1,157,218. Patented 1101.111915.

2 SHEETS-SHEET 2.

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"I, iyy Ano/Mrz;

115 th-iszvcharacterin which the 'operating` parts Y BREAST-DRILL.

y.ToidZZwtm/map?concern. @.-B'ezit ltiibivnthat I, VO'SGAR'D". HAPGooD, a citizen olf- .the-ifllnited States, residing at Grange, ,Massaehusett'sa have invented new and."usefully-jImprovements in Breast-Drills,

of which! the` following isI arspeeilcation ,This invention, relates to tools; and! more particularly to breast dans andthe like- --Qi1e of the objectsaoli tlieinvention is: to provideA a deviceV of this characterY in AWhich yare notiliable toget outoforder-.z Y

LOtherobjects.are-teIQrQVide dev-ice` of ,j thisfeharacter which iscompact in construction, comparativelysimplemand inexpensive 20.

ruse( i` toifnianufanture and Which will be eflicient.y in

,i Other obijeetsl -Wills inpart be obvious and 4in partr be'vpointedf out hereinafter 'in the `claims. .f

gliaA ythe acoonipanyingl showing an 'illustrativeembodiment,of, .the .invention i in connection .with a comprise's'a` fr.

i aan matan. itesm@ ffefen metals refer to, -si:inila.r partszinthe several figures,

lis, an ,elevational view ofja breast drill:embody ing the.invention;V Fig.2i,1s avertical sectional view'on an enlarged. scale;

l `Fig".\ .3isfa sectional view talrengonfthe line 3s-3 voit Fig. 2 Figi'fl I is a detailt view fof, the operat' gfh/aiidle Figp 5 is. a sectional'. vie-W thereof ;.n isa, sectional vievv takenvon .I view taken on ftheline .7p-Tof Eigf2; A 8 fisaperspect'ive viewofla detail..Y Y

Referring to ,the (litallllgs iny Whichby Way of ill'ustratiomythe invention is' shevvn breast drill,.;thef drill ineinbers' 1l and`2 adaprtedvftorhouse thefgear- Ving hereinaterdescribed VThe members 1 and rk2 are held in.. position in anysuitable as for` example, by ascrevvl, a l'pin 4, may befvprovidedfor engaging W ses@ liorined: .the rnenibers hicl'ithey' are" correctly posi- Y A lSpecification of Letters Patent. application med April 7, i914.: seiaino. s'aogi'ai.

e consisting o two, recessed t APatented ct.19, 1915.

tioned'with respect to one 'anotherv The c upper ends of the assembled membersil and 2 formy a lcylindrical projection upon which .l ay sleeve 5 is positioned, being heldin place byl a set: screw 6, and beingprovided at its upper end with a breast plate 7 of anysuitable construction. The lower ends of the assembled menibersl4 and 2f also forni acylinfdrical projection which yis surrounded by a ,sleevey 8.

A Rotatably mounted-in the frame isa spinfr oscnngii. iinrsoonpo'r ommen, MASSACHUSETTS, AssIGNoR 'ro GooDELL-rnnrfr coivI- f -Pni\i;Y-on:GirEnNrI-ELD iviAssAcHUs-Errs, A conronn'rioiv or MASSACHUSETTS.

dler 9 provided at its;l upper or innerendpwith a bevel. pinion 10 vwhich is secured thereto yin' any suitable manner, and provided aty its outer end with achuck 11 which isadapted to .hold the drill bit or other tool. Atta point intermediateits ends thespindlerfis l provided With an annular shoulder'12iadapted to forin- With thelowcr ends of the-menibers rk1 and 2a ball race"or ballbearingsvl. A suitable handle 14 is secured to the: frame which meshes With ay pinion 17 rotatably mountedupon a stud 18. The pinion. 17 is seciiredto agear Wheel 19,.,Which isV also rotatable with respect to the stud 18, and

which meshes,` With a pinion 20 rotatably lmounted upon theshaft 15..- The pinion 2O is secu-red to abevel gear 21 which is rotatablevvithrespect to the/,shaft 15 andwhich meshes, iviththe bevelpinion 10 secured kto .the-spindle 9.` -The bevel gear 2l: isoprovided with. 'a laterally extending annular portion 22 Which'encircles the shaft 15 forming therewith a. sleeveor concentrici, shaft, the outer end of, which engages an annular` shoulder 23 on the shaftcl. The concentric shafts 15 and 22 are provided With recesses w encircle the outer ends ofk the' concentric shafts 15 and 22 and .which is heldin posi-v tion inanysuitable `unan-nerq asfor example,

Vfor holding the instrument steady inthe Y usual manner during the operation.;v

j Journaledin the frame isV a transverse 4shalt 15 to Whichis secured a gear Wheell a set screw 28. The annular portion has v projections 2,7 producing I a dove-tailed groove receiving the handle crank so as to fix the annular portion to the handle, whiler Vthe screw 28 prevents disconnectionpf the parts. vRotatably mounted .upon the annu-` Vlar portion 27V ofthe handle is ring 2,9,the

surface of which is preferably knurled. or

' roughened, andwhich is provided with cir- "cumferentially extendingV slotsr30 and 31.

lVithin these Vslots are oppositely disposed cam surfaces 32 and'33, as clearly shown in Y,

Figs. 6 and .7. Extending through the slots 30Vand .3l Lare studs 34 provided with'fheads "adapted to engage-and ride upon the cam surfaces 32 and 33A and having their lower 'f ends connected to pawls or dogs 35 which are mounted in a recess formed inthe annular portion' 27 Y of the handle `26. n These pawls 35 are Ynormally-,urged inward with respect to thev annular member 27 by'means of springs v36, fas clearly shown in Fig." 5.

` When Ithe pa'wls occupy their innermost position they extendwithin the recesses 24 and-25 formedin the shafts 15 and 22,V and when the pawls'are 'in'V their'raise'd position `they are disengaged from their correspondc ing. recesses, as,` will be evident from an iny 3rofspec'tion of Figs. 2,' Gand Tof thevdrawing.

lnviewV of the fact that'thecam surfaces 32 and 33 'are oppositely disposed 4it'will be u 'understood'that as thefring 29 is rotated one f of the pawls will be'raised by reasonof the fact that the headedr stud v34connected 1 i Y'theretof will ride 'upward on the surface of 35 its coll-acting cam, and theothervpawl will move" into its lowermost'posltion as its cor- A. responding headed stud 34 will lride'downward upon its co-acting cam, the pawl being pressed inward throughthe medium of the spring 36. It will therefore be understood 'i that whenthe ring is rotated'in 'onef direction oneof thepawls will be causedto en- Y gageits corresponding recess and therefore lo'ckfv the lhandle to one of the'concentric shafts, while at the same Y time thef other secondyshaftf'will 'be llocked to f the,Vv handle,

unlockedvfwith respect lto lthe handle. l

It will of course' be under'stood-thatfwhen vthe shaft 22 isrotated, the rotation thereof will be communicated directly to thespindle 9 through bevel gearr2l' and bevel pinion l0,

-thus rotating the spindl`evt9 at its slow speed.

' If the'shaft -15 isrotated itwill rotate .the

' drill' at either `speed it isimerely necessary" Y v spindle 9 through the trainofgears 16, 17,

19, 20,21 and 10, thus, rotating "theV` spindle atfits highest speed. `In order to. actuate the to position the ring 29 in .such a manner that` the" recess "fof Ltheshaftl corresponding to the ldesired speed-will be engaged by its'y 'corresponding pawl, whereby the handle will be locked with respect to such shaft.; As

' shownin Figs. 2', 6 and'?, Vfor example, the Y .parts of the drill are setk forhigh-speed,'the pawl 35 being shovvninlocking` position with vthe recess 24 inthe shaftl;l 1

Having y described, this A, invention in Arcon# nection with. 'an illustrative l embodiment thereofto the details 4of 'whichldisclosure` I the invention' Vis notlof course' to be limited, what is claimed as new andY what is desired toA be secured 'b in the 'appended claims:

' 1. In' a breast.drill, a'frame, afspindle Y rotatably mountedtherein,concentric shafts rotatably mounted "in saidfframe, said "shafts y Letters Patentisset,forth being provided with recessesgvhigh and low speed*gearsjnterposedwith-respect to 'said shafts Iand 'saidspindlaan annulus'rotatable l 'on vthe shafts, a handleattached 4to' Vsaid an' nulusfpawls supported by said annulus and lgears intoand-out-ofoperation-.75 Y 2.` Ina tool, in combination, a Vfr spindle rotatably mounted thereinjand provided at its inner end withfafbevelpin'ion, concentricshafts rotatablymountediin said Kw fframev, a bevel gear 4secured to one of said Y -fittingthe shafts, said pawlsfpbeingadapted f to lengage said recesses, and A'airing shiftablyv mounted on said annulus and i having;oppoiV sitely 'acting -camming surfaces. fori moving* said pawls alternatelyj into and out* of-l the recessesfor interchangeably 'throwingthe aoY shafts andl meshing with said bevelfpinion, a Y, Y

stud, a pinion and a gear wheel securedto,

.one another and rotatablymounted upon said stud, a lgear'wheel.'secured tolthe second Vioo of said concentric 'shaftsand meshing with v said pinionon said stud('afpinion'loosely Vmounted on said -secondshaft and meshing with'V the'gear VWlieelion saidstud, said; last mentioned pinion'being'isecured to'said bevel gear vmounted on said first rnent ioned"shaft,Vw Y.

a :crank 'handle an'dfmeans :for operatively centric shafts. c

Connecting santander@@statesmen-s lna toohiin combination, afframegkcome prisingfrecessed members randY means for .1 'g lholding'said members in Yposition`,"-a spindle ,Y

a rotatably mounted insaidv frame, KYconcentricff` shafts rotatably. ,mounted in Vsaid l frame;V inter-'meshing' gearing carried" onsaid shaft Y housedV within ysaid recessed members land operatively'V connected to said*V shaftsV and V tor said spindle',a crank handle, and'means for'V connecting said handle to either 'one of said` the speed ofthe spindle. f'

4. Ina tool, `in combinatioinaYfrarnefa@l spindlerotatably mounted therein, a pinion secured to said spindle, concentricshafts rotatably monnted'in saidframe,.inter-mesh-y Y me @regenerar .,C'Oeneed Seidl concentric shafts"P for raisingfand vlow@ring J shafts* and to said pinion, a crank handle, In testimony whereof I have signed my and means for-operatively connecting said name to this specieation in the presence of crank handle to either one of said concentric tWo subscribing Witnesses.

shafts and freeing said handle from opera- OSCAR D. HAPGOOD. tive connection with the other one ofV said Witnesses:

concentric shaftswhereby the speedV of the C. D. SEVERANGE,

spindle is Varied. Gr. A. BLAKE.

Copiesrof thispatent ma'y be 'obtained lfor ve cents each, by addressing theV Commissioner of Patents,

- Washington, D. C. l 'e 

